android - 阻止 USSD 对话并读取 USSD 响应？

Question

我对 ussd 进行了很多研究，但我无法阅读 USSD 响应，以及如何防止类似此应用程序的 ussd 对话。

https://play.google.com/store/apps/details?id=com.iba.ussdchecker&hl=en

我安装了这个 https://github.com/alaasalman/ussdinterceptor重启我的手机(S2 android 4.0.3)，发送ussd代码但没有任何反应，有人告诉我必须阅读日志，但我该怎么做。

我尝试使用这些代码从日志中读取 USSD

USSD.java

    package com.example.ussd;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.Calendar;
    import java.util.Date;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;

    import android.util.Log;

    public class USSD {

        private static String startmsg = "displayMMIComplete"; // start msg to look
                                                                // for
        private static String endmsg = "MMI code has finished running"; // stop msg
        private static String trimmsg = "- using text from MMI message: '"; // a msg
                                                                            // to
                                                                            // remove
                                                                            // from
                                                                            // the
                                                                            // text

        private long before = 3000; // delay (ms) before creation of the class
                                    // before a msg (USDD) is valid (use timestamp)
        private long after = 3000; // delay (ms) after creation of the class that a
                                    // msg (USDD) is valid (wait after ms)

        private String msg = ""; // the USSD message
        private boolean found = false;
        private long t = -1; // timestamp of the found log

        public USSD() {
            this(3000, 3000);
        }

        // USSD in log : example
        public USSD(long before_creation, long after_creation) {
            before = before_creation;
            after = after_creation;
            long timestamp = System.currentTimeMillis(); // creation of the class
                                                            // --> look for the USSD
                                                            // msg in the logs
            Log.d("USSDClass",
                    "Class creation - timestamp: " + String.valueOf(timestamp));
            try {
                // sample code taken from alogcat ...
                Process logcatProc = Runtime.getRuntime().exec(
                        "logcat -v time -b main PhoneUtils:D"); // get PhoneUtils
                                                                // debug log with
                                                                // time information
                BufferedReader mReader = new BufferedReader(new InputStreamReader(
                        logcatProc.getInputStream()), 1024);
                String line = "";
                boolean tostop = false;
                long stop = timestamp + after; // to stop the while after "after" ms
                while (((line = mReader.readLine()) != null)
                        && (System.currentTimeMillis() < stop) && (tostop == false)) {
                    if (line.length() > 19) // the line should be at least with a
                                            // length of a timestamp (19) !
                    {
                        if (line.contains(startmsg)) // check if it is a USSD msg
                        {
                            // log example :
                            // "12-10 20:36:39.321 D/PhoneUtils(  178): displayMMIComplete: state=COMPLETE"
                            t = extracttimestamp(line); // extract the timestamp of
                                                        // thie msg
                            Log.d("USSDClass", "Found line at timestamp : "
                                    + String.valueOf(t));
                            if (t >= timestamp - before)
                                found = true; // start of an USDD is found & is
                                                // recent !
                        } else if (found) {
                            // log example :
                            // "12-10 20:36:39.321 D/PhoneUtils(  178): displayMMIComplete: state=COMPLETE"
                            if (line.contains(endmsg))
                                tostop = true;
                            else {
                                // log example :
                                // "12-10 20:36:39.321 D/PhoneUtils(  178): - using text from MMI message: 'Your USSD message with one or several lines"
                                Log.d("USSDClass", "Line content : " + line);
                                String[] v = line.split("\\): "); // doesn't need
                                                                    // log
                                                                    // information
                                                                    // --> split
                                                                    // with "): "
                                                                    // separator
                                if (v.length > 1)
                                    msg += v[1].replace(trimmsg, "").trim() + "\n";

                            }
                        }
                    }
                }
            } catch (IOException e) {
                Log.d("USSDClass", "Exception:" + e.toString());
            }
        }

        public boolean IsFound() {
            return found;
        }

        public String getMsg() {
            return msg;
        }

        // extract timestamp from a log line with format
        // "MM-dd HH:mm:ss.ms Level/App:msg" Example : 12-10 20:36:39.321
        // Note : known bug : happy new year check will not work !!!
        private long extracttimestamp(String line) {
            long timestamp = -1; // default value if no timestamp is found
            String[] v = line.split(" ");
            if (v.length > 1) // check if there is space
            {
                Calendar C = Calendar.getInstance();
                int y = C.get(Calendar.YEAR);
                String txt = v[0] + "-" + y + " " + v[1]; // transform in format
                                                            // "MM-dd-yyyy HH:mm:ss"
                SimpleDateFormat formatter = new SimpleDateFormat(
                        "MM-dd-yyyy HH:mm:ss");
                try {
                    Date tmp = formatter.parse(txt);
                    timestamp = tmp.getTime();
                    String[] ms = v[1].split("."); // get ms
                    if (ms.length > 1)
                        timestamp += Integer.getInteger(ms[1]);

                } catch (ParseException e) {
                    Log.d("USSDClass",
                            "USDD.extractimestamp exception:" + e.toString());
                }
            }
            return timestamp;

        }

    }

UssdActivity.java

package com.example.ussd;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.TextView;

public class UssdActivity extends Activity implements OnClickListener {
    /** Called when the activity is first created. */
    private TextView view;
    private AutoCompleteTextView number;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(this);
        this.view = (TextView) findViewById(R.id.Text2);
        this.number = (AutoCompleteTextView) findViewById(R.id.Text1);
    }

    @Override
    public void onClick(View arg0) {
        String encodedHash = Uri.encode("#");
        call("*" + number.getText() + encodedHash);
        this.view.setText("");
    }

    protected void call(String phoneNumber) {
        try {
            startActivityForResult(
                    new Intent("android.intent.action.CALL", Uri.parse("tel:"
                            + phoneNumber)), 1);
        } catch (Exception eExcept) {
            this.view.append("\n\n " + "\n" + eExcept.toString());
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        USSD ussd = new USSD(4000, 4000);
        if (ussd.IsFound())
            this.view.append("\n test" + ussd.getMsg());
        else
            this.view.append("" + R.string.error_ussd_msg);
    }

}

输出是这样的:

com.sec.android.app.callsetting.allcalls:com.sec.android.callsetting.allcalls.AllCallsProvider Terminated ALSA PLAYBACK device hifi

Answer 1

可以使用无障碍服务。首先创建一个服务类:

public class USSDService extends AccessibilityService {

    public static String TAG = USSDService.class.getSimpleName();

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {
        Log.d(TAG, "onAccessibilityEvent");

        AccessibilityNodeInfo source = event.getSource();
        /* if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED && !event.getClassName().equals("android.app.AlertDialog")) { // android.app.AlertDialog is the standard but not for all phones  */
        if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED && !String.valueOf(event.getClassName()).contains("AlertDialog")) {
            return;
        }
        if(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED && (source == null || !source.getClassName().equals("android.widget.TextView"))) {
            return;
        }
        if(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED && TextUtils.isEmpty(source.getText())) {
            return;
        }

        List<CharSequence> eventText;

        if(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
            eventText = event.getText();
        } else {
            eventText = Collections.singletonList(source.getText());
        }

        String text = processUSSDText(eventText);

        if( TextUtils.isEmpty(text) ) return;

        // Close dialog
        performGlobalAction(GLOBAL_ACTION_BACK); // This works on 4.1+ only

        Log.d(TAG, text);
        // Handle USSD response here

    }

    private String processUSSDText(List<CharSequence> eventText) {
        for (CharSequence s : eventText) {
            String text = String.valueOf(s);
            // Return text if text is the expected ussd response
            if( true ) {
                return text;
            }
        }
        return null;
    }

    @Override
    public void onInterrupt() {
    }

    @Override
    protected void onServiceConnected() {
        super.onServiceConnected();
        Log.d(TAG, "onServiceConnected");
        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        info.flags = AccessibilityServiceInfo.DEFAULT;
        info.packageNames = new String[]{"com.android.phone"};
        info.eventTypes = AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED | AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED;
        info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
        setServiceInfo(info);
    }
}

在 Android list 中声明它

<service android:name=".USSDService"
    android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>
        <meta-data android:name="android.accessibilityservice"
            android:resource="@xml/ussd_service" />
 </service>

创建一个描述无障碍服务的 xml 文件，名为 ussd_service

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:accessibilityEventTypes="typeWindowStateChanged|typeWindowContentChanged"
android:accessibilityFeedbackType="feedbackGeneric"
android:accessibilityFlags="flagDefault"
android:canRetrieveWindowContent="true"
android:description="@string/accessibility_service_description"
android:notificationTimeout="0"
android:packageNames="com.android.phone" />

就是这样。安装应用后，您必须在辅助功能设置中启用该服务(设置->辅助功能设置-> YourAppName)。

解决方案描述here和 here (russian) .